PMC Members must be elected

The EDP states that:

PMC leads are approved by the Board of Directors; PMC members are elected by the existing PMC leads and members, and approved by the EMO(ED).

In the handbook section on PMC Member Elections, we state:

Some PMCs are set up to have a representative from each of the projects in the top-level project. Other PMCs are more exclusive and run an election similar to that of a project lead election.

The first sentence suggests that a project representatives can just be selected and we're done (that is, without an election). We need to make it clear that the manner by which members are selected must take the form of an election.

Further, we should describe the form of the election. We have no specific infrastructure configured for PMC Member elections, so they should be run in the PMC mailing list.